Abstract: A cabinet for covering an air conditioner mounted upon and extending through an opening in a wall separating an enclosed inside environment from an outside environment. The cabinet is readily opened to facilitate active air conditioner operation and readily closed to prevent communication of the outside environment with the inside environment when the air conditioner is inactive. The cabinet includes a planar top portion, a planar left side portion a planer bottom portion disposed opposite the planar top portion, a planar right side portion and an outer facing surface interconnected to form the cabinet structure. At least one angled cabinet-mounting member is attached to the planar top portion and configured to meet and cooperate with at least one angled wall-mounting member fixed to the wall, thereby securing the cabinet to the wall. At least one set of doors is attached to the outer facing surface and configured to be opened and closed.